Japanese cherry blossom viewing is one of the most important traditional activities in Japan in spring, and it is called Hanami. During cherry blossom viewing, people will gather in parks, courtyards or river banks to enjoy the beauty of cherry blossoms. The following are some customs and foods related to cherry blossom viewing in Japan:

1. Cherry blossom festivals: some places will hold cherry blossom festivals, including traditional dances, music performances and celebrations, which will add a happy atmosphere.

2. Cherry blossom viewing under the cloth: In some parks or courtyards, people will lay mats and cloth balls and sit under the cherry trees to enjoy the cherry blossoms better.

3. Enjoy cherry blossoms: People will wear traditional kimonos or bathrobes and bring umbrellas and fans to add festive atmosphere.

4. Cherry blossom viewing food: When enjoying cherry blossoms, people like to bring food and drinks and enjoy picnics. Some common cherry blossom viewing foods include:

- Sakura Sake: the cherry blossoms are soaked in sake, giving them an alcoholic aroma.

- Sakura Senbei: a thin biscuit with cherry blossom flavor, and sometimes cherry blossom petals are added.

- Sakura Wagashi: a traditional Japanese dessert, usually with the shape or taste of cherry blossoms.

These customs and foods are designed to increase the fun and celebration atmosphere of cherry blossom viewing while enjoying the cherry blossoms. Cherry blossom viewing is an important part of Japanese culture, attracting many people to enjoy and experience it.